An electronics store receives a shipment of 40 graphing calculator, 3 that are defective. Four of the calculators are selected to be sent to a local high school. A) How many selections can be made?
B) How many of those selections will contain no defective calculators?

Atype of plant is introduced into an ecosystem and quickly begins to take over. a scientist counts the number of plants after mmonths and develops the equation p(m)= 19.3(1.089)^m to model the situation. most recently, the scientist counted 138 plants.assuming there are no limiting factors to the growth of the plants, about how many months have passed since the plants werefirst introduced? a)o 6.1b)0.6.6c)10 72d)o 23.1